/* =============================================
   BASE.CSS — Tokens, Reset, Typography, Utilities
   Fabbro Metalli Roma
   ============================================= */

/* ─── Design Tokens ─────────────────────────── */
:root {
  /* Colours */
  --clr-bg:        #141412;
  --clr-surface:   #1d1d1a;
  --clr-surface-2: #252521;
  --clr-border:    #2e2e2a;
  --clr-steel:     #3a3a35;
  --clr-muted:     #6b6b62;
  --clr-text:      #e8e8e0;
  --clr-text-dim:  #9e9e94;
  --clr-accent:    #c94a1e;
  --clr-accent-dk: #a33a14;
  --clr-accent-lt: #e05a28;
  --clr-blueprint: rgba(46, 60, 80, 0.5);

  /* Spacing scale */
  --sp-xs:   0.5rem;
  --sp-sm:   1rem;
  --sp-md:   2rem;
  --sp-lg:   4rem;
  --sp-xl:   7rem;
  --sp-2xl:  10rem;

  /* Type sizes */
  --fs-eyebrow: 0.7rem;
  --fs-body:    clamp(0.95rem, 1vw + 0.5rem, 1.1rem);
  --fs-sm:      0.875rem;
  --fs-h3:      clamp(1.1rem, 1.5vw + 0.5rem, 1.35rem);
  --fs-h2:      clamp(2rem, 4vw + 0.5rem, 3.5rem);
  --fs-display: clamp(4rem, 10vw, 10rem);

  /* Typography */
  --font-display: 'Bebas Neue', sans-serif;
  --font-body:    'Space Grotesk', system-ui, sans-serif;

  /* Misc */
  --radius-sm:  3px;
  --radius-md:  6px;
  --dur-fast:   0.2s;
  --dur-mid:    0.5s;
  --dur-slow:   0.8s;
  --ease-out:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);

  /* Blueprint grid */
  --grid-line: rgba(100, 130, 160, 0.09);
  --grid-size: 40px;
}

/* ─── Reset ──────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--clr-bg);
  color: var(--clr-text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: 1.65;
  overflow-x: hidden;
}

img, video, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ─── Blueprint background ───────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: var(--grid-size) var(--grid-size);
  pointer-events: none;
  z-index: 0;
}

/* ─── Global layout helpers ──────────────────── */
.container {
  width: min(1240px, 100% - 3rem);
  margin-inline: auto;
}

.section-pad {
  padding-block: var(--sp-xl);
}

/* ─── Eyebrow label ──────────────────────────── */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: var(--sp-sm);
}

.eyebrow::before {
  content: '';
  display: inline-block;
  width: 1.8rem;
  height: 1px;
  background: var(--clr-accent);
  flex-shrink: 0;
}

/* ─── Section heading ────────────────────────── */
.section-title {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--clr-text);
}

/* ─── CTA Button ─────────────────────────────── */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 2rem;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-text);
  border: 1px solid var(--clr-accent);
  overflow: hidden;
  transition: color var(--dur-fast) ease;
  z-index: 1;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--clr-accent);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform 0.35s var(--ease-out);
  z-index: -1;
}

.btn:hover::before,
.btn:focus-visible::before {
  transform: scaleY(1);
}

.btn:focus-visible {
  outline: 2px solid var(--clr-accent);
  outline-offset: 3px;
}

/* ─── Scroll-reveal utility ──────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Divider line ───────────────────────────── */
.divider {
  width: 100%;
  height: 1px;
  background: var(--clr-border);
}

/* ─── Scrollbar ──────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--clr-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--clr-steel);
  border-radius: 3px;
}